Add code signature, string table, and symbol table sizes

[trevor-e]

Adds some extra breakdown of the LINKEDIT segment to match our old behavior:

[codecov]

Codecov Report

❌ Patch coverage is 91.02564% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.50%. Comparing base (5e8aa78) to head (ffb1ddc).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...rc/launchpad/size/treemap/macho_element_builder.py	78.26%	1 Missing and 4 partials ⚠️
src/launchpad/parsers/apple/macho_parser.py	93.10%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #451      +/-   ##
==========================================
+ Coverage   80.46%   80.50%   +0.03%     
==========================================
  Files         159      159              
  Lines       13410    13462      +52     
  Branches     1414     1424      +10     
==========================================
+ Hits        10790    10837      +47     
  Misses       2086     2086              
- Partials      534      539       +5     

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[sentry]

Bug: AttributeError occurs if self.binary.code_signature is None despite has_code_signature being True when accessing cs.data_size.
_{Severity: CRITICAL | Confidence: 0.95}

🔍 Detailed Analysis

The code attempts to access cs.data_size on line 335 without ensuring cs is not None. This occurs when self.binary.has_code_signature is True but self.binary.code_signature returns None, leading to an AttributeError: 'NoneType' object has no attribute 'data_size'. This can happen if the LIEF library returns None for code_signature under certain conditions, such as with malformed binaries, causing an unexpected AttributeError that will propagate up.

💡 Suggested Fix

Add a null check for self.binary.code_signature after the has_code_signature check. Modify if self.binary.has_code_signature: to if self.binary.has_code_signature and self.binary.code_signature:.

🤖 Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent.
Verify if this is a real issue. If it is, propose a fix; if not, explain why it's not
valid.

Location: src/launchpad/parsers/apple/macho_parser.py#L333-L336

Potential issue: The code attempts to access `cs.data_size` on line 335 without ensuring
`cs` is not `None`. This occurs when `self.binary.has_code_signature` is `True` but
`self.binary.code_signature` returns `None`, leading to an `AttributeError: 'NoneType'
object has no attribute 'data_size'`. This can happen if the LIEF library returns `None`
for `code_signature` under certain conditions, such as with malformed binaries, causing
an unexpected `AttributeError` that will propagate up.

_{Did we get this right? 👍 / 👎 to inform future reviews.}